Press cylinder mounting means



"" J. R. BAUMGARTNER PRESS CYLINDER MOUNTING MEANS 2 Sheets-Sheet 1Filed Dec. 17, 1951 Fle.3

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ATTORNEYS June 1954 J. R. BAUMGARTNER 82,

PRESS CYLINDER MOUNTING MEANS Filed Dec. 17, 1951 2 Sheets-Sheet 2 7gbFl :1. 8

. I INVENTOR.

M f mdp ATTORNEYS Patented June 29. 1954 UNITED STATES PATENT OFFICE2,682,218 PRESS CYLINDER MOUNTING MEANS John R. Baumgartner, Milwaukee,Wis.

Application December 17, 1951, Serial No. 262,081

Claims. 1

The invention relates to printing presses and more particularly to aplate cylinder mountin arrangement.

In printing presses, it is often desirable to move the plate cylinderinto and out of operative relation with the inking roll and to a lessextent with the impression cylinder, and it is also desirable to be ableto remove the plate cylinder completely from the press for putting onthe printing forms. The object of the present invention is to provide anarrangement which meets both of the above requirements and especially toprovide a yieldable or spring connection between the journal box of thecylinder and its hold down means so that the plate cylinder may have alimited movement to aposition out of contact With the inking roll and sothat the compression of said spring means by the hold down means willhold the cylinder in an operative position. Also preferably the holddown means is a breech block pivotally mounted on the press frame sothat it is always on the press, which breech block carries a cam lock toexert a hold down force on the spring means.

This application is a continuation in part of my oopending applicationSerial No. 202,709, filed December 26, 1950, now abandoned.

The invention further consists in the several features hereinafter setforth and more particularly defined by claims at the conclusion hereof.I

What I claim as my invention is:

Fig. 1 is a side elevational view of that portion of a printing pressunit embodying the invention;

Fig. 2 is a front end elevation view of the press mechanism embodyingthe invention;

Fig. 3 is a detailed sectional view taken on the line 33 of Fig. 2,parts being broken away;

Fig. 4 is a detailed side elevation view taken along the line 44 of Fig.2

Fig. 5 is a detailed perspective view of the plate cylinder lifting cam;

Fig. 6 is a detailed vertical sectional view taken on the line 6-6 ofFig. 2;

Fig. 7 is a detailed vertical sectional view taken on the line |--'l ofFig. 1;

Fig. 8 is a detailed vertical sectional view taken on the line 88 ofFig. 6;

Fig. 9 is a circuit diagram for the power throw out cylinder.

Referring to Figs. 1 and 2, the numeral [0 designates the side framemembers of a printing press, H the plate cylinder, [2 the impresisoncylinder, and I3 the inking roll supplied with ink from the fountain I4by the fountain roll Ma.

The shafts for the above named cylinders and rolls are all suitablyjournalled in bearings carried by the frame or parts associated there-.with, but the present invention is only concerned with the mounting ofthe plate cylinder and will, therefore, be confined thereto. The platecylinder H has shaft ends [5 which extend through bearing blocks orboxes I6 removably mounted in the frame members I0. One of the shaftends extends through a bearing l I in one of the boxes 16 and has anouter extension carrying a gear 18 which meshes with an annular gear I 9carried in a housing 2t having a drive shaft extension 2|. The othershaft end is journalled in a sleeve bearing 22 (see Fig. 7) mounted in asleeve 23 fixed to the other block [8 and provided with a threadedextension 24 upon which a lock nut 25 and a feed nut 26 provided with ahand wheel portion 21 are mounted. The feed nut at its other end carriesthe outer race of a ball bearing journal 28 whose inner race is securedto the extended end 29 of the shaft end 15 by a clamping screw 30.

With the above arrangement the turning of the nut 26 in a direction toback ofi said nut from the extension 24 moves the plate cylinder towardthe left so that the gear i8 may be moved longitudinally out of meshwith the gear I9 so as to disconnect the plate cylinder II from itsdrive and facilitate its removal from the frame of the press.

While only one of the bearing blocks I6 is shown in detail, each bearingblock is slidably mounted and guided in an angled slot 3| formed in itsassociated frame member I0 by a tongue and groove connection in whichthe bearing block has centrally located oppositely disposed tongues 32working in grooves 33 in opposite sides of the slot 3|. In operativeposition the bottom of each block it abuts the bottom of its slot 3|.The angular disposition of the slots 3| are such that a small outward orupward movement of the boxes It moves the plate cylinder ll out ofcontact with the inking roll l3 and the impression cylinder [2. Asshown, the boxes 16 are disposed at an angle of thirty degrees to thehorizontal. The slots 3| open up into the corner portions of the framemembers iii. In each instance, the open end of the slot is closed by abreech block or swingable cap 34 pivoted on its frame member formovement into and out of its closed position.

Each block 34 is formed to provide a flat eccentrically disposed basehinge portion 35 and main portion having a depending right angledextension 36. A portion of the upper side of the slot 3| is cut off orformed to provide a surface 31 which extends at right angles to the slotand forms a bearing surface for the base portion 35 which is pivotallymounted relative thereto on a headed pin or stud 38 having threadedengagement at 39 with the frame member II and extending throughdifferential bores 46 and 4| in the block which provide a bearing forthe shank of the pin and its head. A detent in the form of a ball 42 andspring 43 mounted in a bore 44 in the block 34 is adapted to releasablyengage one of the radially spaced depressions 45 in the surface 31 tohold said block in either a closed or open position.

In its closed position, each block 34 is operatively connected to itsassociated bearing block I6 by a relatively heavy spring 46 which bearsat its inner end upon the top surface of the block I6 and is anchored atits upper or outer end to the shank of a cylindrical seat or head member41 slidably mounted in a bore 48 extending centrally through theextension 36. The reduced diameter portion of the head of the member 41bears against a cam member 49 rotatably mounted in a bore 56intersecting the bore 48 and extending transversely of the block andcarrying a hand crank The cam member 49 has a spring tensioning surface52 and a relief surface 53 and has been shown in Figs. 1 and 6 in springtensioning position. Swinging the crank 5| upwardly from the positionshown brings the relief surface 53 under the head of the member 41 andrelieves the spring 46 of its compression load and permits the block 34to be swung outwardly from the frame member I I to a position in whichthe extension 36 clears the slot 3| so that the bearing block I6 at thisend of the plate cylinder may be pulled upwardly and outwardly of theslot 3 I.

When the spring 46 is relieved of its load, its inner end may be movedinwardly above the bottom of the extension 36 by a light spring 54interposed between the seat member 4'! and a sleeve 55 having a pressedfit in the lower end of the bore 48. With the cam 49 in holding positiona predetermined compression load is imposed on the spring 46 which actsto hold the bearing block I6 down against the bottom of the slot 3|, andit also permits an outward movement of the block I6 as hereinafterdescribed.

For removing the plate cylinder II from the press longitudinal movementof said cylinder in its bearings by the turning of the nut 26 moves thegear I8 out of mesh with its drive gear I9. Swinging of the cranks 5| tobring their cams 49 to a position in which the relief surfaces 53 arealined with the seat members 41 relieves the bearing boxes I6 of theholding pressures of the springs 46 and permits the blocks 34 to beswung about their pivots to open positions so that the bearing blocks I6at the ends of the plate cylinder I I may be moved upwardly with saidcylinder to a position clear of the slots 3| and then removed from thepress for attaching the make ready thereto after which the blocks I6 areagain replaced in the slots 3| and the blocks 34 then turned back to theclosed position shown in Figs. 1 and 6 and the cranks 5| turned to bringthe cams 49 to a spring loading position to hold the blocks I6 inoperative position.

In printing presses, it is usual to provide some kind of a throw out orthrow outs to disengage the associated cylinders of the press. In thepresent instance a throw out means is provided for the plate cylinder IIwhich means includes the spring mounting of the bearing blocks for saidcylinder as above described cooperating with a means for moving theblocks I6 outwardly to move the plate cylinder out of operativeassociation with the inking roll I3 and the impression cylinder I2.

The means for moving the blocks I6 outwardly comprises a lever or camshaft 56 journalled in the side frame members II and provided withspaced cam surfaces 51, each of which engages an associated thrust rod58 slidably mounted in a bore 59 of the frame extending at an angle,here shown as forty-five degrees to the horizontal, and hearing at itsouter end in a recess 60 in the bottom of the associated bearing blockl6. With this arrangement swinging of the shaft 56 in a clockwisedirection as viewed in Fig. 6 will cause the cam surfaces 51 to exert anoutward thrust on the rods 58 and hence an outward thrust on the boxesI6 against the opposing forces of the springs 46 to move the boxes I6outwardly an amount sufficient to move the cylinder free of the inkingroll I3 and the impression cylinder I2. The cam shaft 56 may be manuallyor power operated. As shown, it has a crank 6| operatively connected tothe rod 62 of a piston working in a double acting air cylinder 63supplied with compressed air at the desired pressure through a pipe 64and a control valve 65 of any suitable construction and shown in Fig. 9as a piston valve, whose valve member 66 is moved in one direction by aspring 61 and in the other direction by a solenoid 68.

The solenoid 68 is energized from current supply lines 69 and III, theline I0 having the main line switch II and the plate cylinder motorswitch I2 therein. The main drive motor M for the machine is connectedin parallel with the lines 69 and I0 beyond the switch II. The drivemotor M for the plate cylinder drive shaft extension 2| is connected inparallel across the lines 69 and III in back of the switch I2. With thisarrangement the solenoid 68 is energized only if both switches II and I2are closed and the plate cylinder motor M is running. When the solenoid68 is energized, it moves the valve 66 to a position in which compressedair is supplied to the lower end of the cylinder 63 and the lever 56 is'then brought to its inoperative position shown in Figs. 4 and 6. Ifduring the operation of the press it is necessary to throw out the platecylinder, the opening of the switch I2 deenergizes the solenoid 68 andthe spring 61 then shifts the valve 66 to a position to supplycompressed air to the upper end of the cylinder 63 and move the pistontherein downwardly to swing the lever 56 as viewed in Fig. 6 clockwiseto its throw out position. Also the opening of the switch TI to stop thepress will deenergize the solenoid and similarly cause the swinging ofthe lever or cam shaft 65 to its throw out position. Thus whenever thepress is stopped or the plate cylinder motor M is stopped, the platecylinder II will be moved to a position clear of the inking roll I3 andthe impression cylinder I2.

I desire it to be understood that this invention is not to be limited toany specific form or arrangement of parts except in so far as suchlimitations are included in the appended claims.

What I claim as my invention is:

1. In a printing press, the combination of spaced side frame membershaving alined open end slots, bearing blocks slidably keyed in saidslots, a press cylinder journalled in said blocks, drive means for thepress cylinder, a movable closure on each frame member for the open endof its slot, spring means carried by said closure and interposed betweensaid closure and said bearing blocks in the closed position of theclosure, movable means controlled by the operator and carried by eachclosure to compressively load its associated spring means in the closedposition of said closure to hold the associated bearing block inoperative position at the inner end of its mounting slot under apredetermined spring load, throw out means engageable with the sides ofthe bearing blocks at the bottoms of said slots for moving said bearingblocks and the press cylinder associated therewith against the load ofsaid spring means to move said cylinder out of operative relation withother rolls of the press, a main drive electric motor for the machine, adrive electric motor for said press cylinder, a current supply circuitfor said motors including out out switches, a fluid pressure actuatorfor said throw said supply circuit controlled by either of said outmeans, and electrically operated means in switches for rendering saidactuator operative when either of said switches are opened.

2. In a printing press, the combination of spaced side frame membershaving alined open end slots, bearing blocks slidably keyed in saidslots, a press cylinder journalled in said blocks and engageable withanother cylinder of the press, drive means for said press cylinder, aclosure block for each frame member having an eccentrically disposedside hinge portion pivotally mounted to swing on its associated sideframe member adjacent said slot and having a depending right angledextension movable into and out of said slot, spring means mounted in abore of said angled extension and engageablc at one end with the bearingblock associated with said closure block, movable means carried by eachclosure block engageable with the other end of said spring means tocompressibly load the same in the closed position of said closure blockto hold the associated bearing block in operative position at the innerend of its mounting slot under a predetermined spring load, and throwout means engageable with the sides of the bearing blocks at the bottomsof said slots for moving the same and the press cylinder associatedtherewith against the load of said spring means to move said cylinderout of operative relation with said other press cylinder.

3. In a printing press, the combination of spaced side frame membershaving alined open end slots, bearing blocks slidably keyed in saidslots, a press cylinder journalled in said blocks and engageable withanother cylinder of the press, drive means for said press cylinder, amovable closure on each frame member for the open end of its slot,spring means interposed between said closures and said bearing blocks inthe closed positions of said closure, movable means controlled by theoperator and carried by each closure to compressively load itsassociated spring means in the closed position of said closure to holdthe associated bearing block in operative position at the inner end ofits mounting slot under a predetermined spring load, and throw out meansincluding an oscillatory shaft extending transversely through said sideframe members and having spaced flat cam faces working within theconfines of said frame members, thrust rods, each slidably mounted in abore in its associated side frame member extending between said shaftand the block in said frame member and in thrusting engagement with thecam face on said shaft and a portion of the bottom of the bearing blockto be moved, the axis of each thrust rod being alined with the axialline passing through the centers of said oscillatory shaft and the shaftfor said press cylinder.

4. In a printing press, the combination of spaced side frame membershaving alined open end slots, bearing blocks slidably keyed in saidslots, a press cylinder journalled in said blocks and engageable withanother cylinder of the press, drive means for said press cylinder, anangled closure block for each slot having a side hinge portion pivotallymounted on its associated side frame member, a spring mounted in eachangled block for engagement with its associated bearing block, a rotarycam mounted in each angled block for conigiressively loading said springin the closed position of said closure block to hold the associatedbearing block in operative position at the inner end of its mountingslot under a predetermined spring load, and throw out means engageablewith the sides of the bearing blocks at the bottoms of said slots formoving the same and the press cylinder associated therewith against theload of said springs to move said cylinder out of operative relationwith said other press cylinder. 7

5. In a printing press, the combination of spaced side frame membershaving alined open end slots, bearing blocks slidably keyed in saidslots, a press cylinder journalled in said blocks and engageable withanother cylinder of the press, drive means for said press cylinder, amovable closure on each frame member for the open end of its slot andprovided with a bore having differential diameters, a spring mounted inthe bore of its associated closure for engagement with its associatedbearing block and carrying a head, a rotary cam mounted in each closureand having a release position and adapted to engage its associated headto cornpressively load its associated spring in the closed position ofsaid closure to hold the associated bearing block in operative positionat the inner end of its mounting slot under a predetermined spring load,a second spring interposed between said head and the portion of the boreof larger diameter in its associated closure to move said first namedspring to an inoperative position when said rotary cam is in its releaseposition, and throw out means engageable with the sides of the bearingblocks at the bottoms of said slots for moving said bearing blocks andthe press cylinder associated therewith against the loads of saidsprings to move said cylinder out of operative relation with said otherpress cylinder.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 751,946 Shoening Feb. 9, 1904 1,089,740 Barber Mar. 10, 19141,582,939 Harrold Apr. 29, 1926 1,587,502 Blaine et al June 8, 19261,975,631 Brawn Oct. 2, 1934 2,231,839 Ritzerfeld Feb. 11, 19412,432,133 Babicz Dec. 9, 1947 2,539,965 Moss et a1 Jan. 30, 1951

